Securing components of a magnetic coupling (specifically the inner and outer rotor hubs or bearing races) onto their respective drive and driven shafts is crucial for maintaining the precise air gap and alignment required for efficient, non-contact torque transfer. These assemblies are subjected to high torsional load, rotational speed, and heat. Any component shift compromises the air gap, leading to decoupling, inefficiency, and potential contact between the magnets.
Magnetic couplings are often used in sealed systems (pumps, mixers) to prevent fluid leaks, making the structural integrity of the hub-to-shaft bond essential for long-term sealing.
INCURE WeldLock™ 365 Retaining Compound
For securing magnetic coupling hubs—where maximum shear strength and precise concentricity are paramount—the WeldLock™ 365 provides the highest structural integrity. Its superior strength ensures the magnetic components maintain their optimal air gap, maximizing torque transmission and minimizing energy loss.
| Feature & Benefit | Technical Insight for Magnetic Couplings | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to torsional slip under load. | Zero Slip: Guarantees absolute 100% torque transmission and maintains the critical air gap integrity. |
| High Temperature Resistance | Withstands continuous operational temperatures up to 200∘C (392∘F), essential for components that may generate eddy current heat. | End the Heat Threat: Ensures the bond remains strong and rigid under thermal load. |
| Fills Close Clearance Gaps | Ideal for components with an interference or true close-tolerance slip fit (less than 0.05 mmdiametral clearance). | Maximizes Concentricity: Converts the fit into an integrated component, optimizing balance and alignment for best magnetic coupling efficiency. |
| Fluid Immunity | Inert to various system fluids and coolants, protecting the joint in sealed pump/mixer environments. | Reliability Assured: The bond remains permanently intact despite fluid exposure. |
Application Steps: Locking Magnetic Coupling Hubs for Precision
Preparation (Critical): Thoroughly clean both the coupling hub bore and the shaft surface. Remove all oil, grease, paint,and residue. Use a powerful degreasing solvent (like acetone or industrial cleaner) and wipe until both metal surfaces are perfectly dry.
Application: Apply a continuous, liberal bead of WeldLock™ 365 evenly around the shaft surface or the inside circumference of the hub bore. Ensure the compound completely covers the mating area.
Assembly: Press or slide the coupling hub onto the shaft. Ensure the component is seated correctly (axially) and wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a full 24 hours for the compound to reach full cure strength before applying torque or operating the coupling.
Stop risking magnetic decoupling and ensure your contactless drive systems are absolutely rigid and precise.